venezuelan manufacture ears gave their mannequins bigger busts because so manier getting enhancement. the society of plastic surgeons estimated one-third of women 18 to 40 had breast implants. in the u.s. our expanding waist lines imimpacting us in other ways. reuters reported that u.s. hospitals were enforced to buy bigger wheelchair s, had bigger patient. >> a test was run about the affect of heavy passengers on buses. it impacted cars because they are using a billion more in gas now than if we weighed the same in 1950. baseball has the biggest tell-tale sign, both teams replacing their stadiums and the width of the seats had to be impressed by one to two inches. >> too bad neither team squeezed >> no doubt about it, innovation changes our lives. opening doors ... opening possibilities. taking the impossible from lab ... to life. on techknow, our scientists bring you a sneak-peak of the future, and take you behind the scenes at our evolving world. techknow - ideas, invention, life. on al jazeera america al jazeera america. >> should college athletes be allowed to unionize and bargai